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    <meta charset="UTF-8">
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    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
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<body>
<script>
    //数组反转
    function reverseArray(arr) {
        for (var i = 0; i < arr.length / 2; i++) {
            var temp = arr[i];
            arr[i] = arr[arr.length - i - 1];
            arr[arr.length - i - 1] = temp;
        }
        return arr;
    }

    var arr = [10, 20, 30, 40, 50];
    console.log(reverseArray(arr));

    //冒泡排序
    function sortArray(arr) {
        for (var i = 0; i < arr.length - 1; i++) {
            for (var j = 0; j < arr.length - 1 - i; j++) {
                if (arr[j] < arr[j + 1]) {
                    var temp = arr[j];
                    arr[j] = arr[j + 1];
                    arr[j + 1] = temp;
                }
            }
        }
        return arr;
    }

    var arr = [5, 659, 4894, 5464, 56, 3465, 156, 1];
    console.log(sortArray(arr));


</script>
</body>
</html>